The trident from 10-11 century - coat of arms of Ukraine was found in Russia.

Suspension from 10-11 century with a personal mark of Rurikovichi was  found during the examination at the settlement Kleschin ,Pleshcheeva lake in the surroundings Pereslavl in the Yaroslavl region.  Scientists say that the suspension is quite rare (total scientists have known little more than 50 such symbols) was a symbol of royal authority and confirming the authority of its bearer.  Finding trapezoidal metal pendants with princely sign of the trident indicates that the new settlement to the north-east of Kievan Rus, at the end of 10-11 centuries controlled the princely power and have high status. Since we got only half of the suspension, to determine what exactly is the sign belonged to Prince, it is impossible, but it can be assumed that this is the trident of Vladimir, Yaroslav, or someone from their closest relatives, who reigned in the 10-11 centuries.
 The trident shape - a shape were signs of Svyatoslavich, Prince Vladimir and Yaroslav the Wise, and in the early 20th century Mikhail Hrushevsky proposed as a national symbol of Ukraine trident of Vladimir.

The change of coat of arms of Ukraine. Ukrainian  trident-tryzub

 

Ukrainian trident nowdays: